Support changing cursor shape in iTerm2 in tmux

Depends on setting the following in `.tmux.conf`:

    set -ga terminal-overrides '*:Ss=\E]1337;CursorShape=%p1%d\7'

This allows changing the iTerm2 cursor shape using the same escape
sequences as used for VTE compatible terminals.

.conduit.yaml

@@ -17,6 +17,7 @@
       src: prompt_fresh_setup
       dst: ~/.local/share/zsh/site-functions/prompt_fresh_setup
 - repo:
-    - https://github.com/zsh-users/zsh-syntax-highlighting.git
+    - https://github.com/zsh-users/zsh-autosuggestions.git
     - https://github.com/zsh-users/zsh-history-substring-search.git
+    - https://github.com/zsh-users/zsh-syntax-highlighting.git
 - message: zsh will be the default prompt after next login

zshrc

@@ -3,8 +3,12 @@
 
 # Load plugin scripts
 plugin-load() { source ~/.config/zsh/$1/$1.plugin.zsh }
-plugin-load zsh-syntax-highlighting
+plugin-load zsh-autosuggestions
 plugin-load zsh-history-substring-search
+plugin-load zsh-syntax-highlighting
+
+# Disable non end-of-line autosuggest accept widgets
+ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=(end-of-line vi-end-of-line)
 
 # Remove duplicates from history
 setopt hist_ignore_all_dups
@@ -50,6 +54,10 @@ bindkey -M vicmd 'gcc' vi-pound-insert
 
 # TODO: vi-pipe???
 
+# Enable accepting autosuggestions
+bindkey '^O' forward-word
+bindkey '^P' autosuggest-accept
+
 # Enable substring history search with 'j' and 'k'
 bindkey -M vicmd 'k' history-substring-search-up
 bindkey -M vicmd 'j' history-substring-search-down
@@ -61,26 +69,28 @@ bindkey -M vicmd 'K' run-help
 # Disable Ex mode with ':'
 bindkey -rM vicmd ':'
 
+# Enable '<Shirt><Tab>' reverse order completions
+bindkey '^[[Z' reverse-menu-complete
+
 # Use editor to edit command line with '<Ctrl>V'
 autoload -U edit-command-line
 zle -N edit-command-line
 bindkey -M vicmd '^V' edit-command-line
 
+# Get the shells parent process name.
+ppid_name() { echo $(ps -p $(ps -p $(echo $$) -o ppid=) -o comm=) }
+
 # Enable changing cursor shape based on vi mode
-if [ "$TMUX" != "" ]; then
-  tmux_before="\EPtmux;\E"
-  tmux_after="\E\\"
+if [ "$ITERM_PROFILE" != "" ] && [ "$TMUX" = "" ]; then
+  # iTerm2 cursor shape escape sequences outside tmux
+  cursor_block="\e]50;CursorShape=0\C-G"
+  cursor_line="\e]50;CursorShape=1\C-G"
+elif [ "$(ppid_name)" != "python2" ]; then
+  # iTerm2 inside tmux or VTE compatible cursor shape escape sequences,
+  # exclude Guake even though it's VTE based it doesn't like these
+  cursor_block="\e[2 q"
+  cursor_line="\e[6 q"
 fi
-if [ "$ITERM_SESSION_ID" != "" ]; then
-  # iterm2 cursor shape escape sequences
-  cursor_block="$tmux_before\E]50;CursorShape=0\C-G$tmux_after"
-  cursor_line="$tmux_before\E]50;CursorShape=1\C-G$tmux_after"
-else
-  # VTE compatible cursor shape escape sequences
-  cursor_block="$tmux_before\E[2 q$tmux_after"
-  cursor_line="$tmux_before\E[6 q$tmux_after"
-fi
-unset tmux_before tmux_after
 
 if [[ ! -z "$cursor_block" && ! -z "$cursor_line" ]]; then
   # Change cursor shape when vi mode changes